Molding apparatus.



No. 755,574. PATENTED MAR. 22, 1904.

P. LARGIE.

' MOLDING APPARATUS.

APPLICATION FILED JUNE 25, 1903.

N0 MODEL.

Patented March 22, 1904.

PATENT EEicE.

PETER LARGIE, OF GRANBY, CANADA.

MOLDING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 755,574, dated March22, 1904. App1icationfi1edJune25,1903. Serial N0. 163,052. (No model.)

T0 (1, whom it may concern:

Be it known that I, PETER LARGIE, of Granby, Province of Quebec, Canada,have invented certain new and useful Improvements in Molding Apparatus;and I do hereby declare that the following is a full, clear, and exactdescription of the same.

This invention has for its object to insure the production of a cleancasting, to enable the ingate to be cleansed, and to facilitate thewithdrawal of the sprue.

The invention may be said, briefly, to consist of a permanent hingedconnection between the cope and the drag, a guard-strip to prevent sandor foreign substance falling into the space between the cope and dragwhen the latter are reversed for ramming purposes, and a combinedpattern and follow board having a hole to receive and support the sprue,such hole extending completely through the board.

For full comprehension, however, of my invention reference must be hadto the accompanying drawings, forming a part of this specification, inwhich similar reference characters indicate the same parts, and wherein-Figure 1 is a perspective view of a combined pattern and follow boardconstructed according to my invention; Fig. 2, a similar view with theflask set in place; Fig. 3, a similar View to Fig. 2 with the flaskfilled and the filling rammed and the sprue drawn; Fig. 4, a perspectiveview illustrating my improved flask with the bottom board set in place,the whole turned over, and my combined pattern and follow board drawn.Fig. 5 is a perspective view of the completed casting, and Fig. 6 adetail vertical sectional view of the filled and rammed flask andillustrating particularly my improved manner of retaining and bracingthe sprue.

The combined pattern and follow board consists of an oblong board 6,having upon one side thereof and preferably about one-quarter way fromone end a counterpart 0 of the matrix, from which the article to be castwill receive its exterior form. About a quarter-way from the oppositeend of the board is located a counterpart (Z of the loam-core, fromwhich the interior of the article to be cast will receive its form. Anaperture is is formed in the board near the counterpart c and accordingto my invention extends completely through the board, while a pair ofrecesses b, transversely and midway of the length of the board,accommodate the hinges by which the halves of the flask are hingedtogether, as will be presently pointed out.

The flask a f is preferably made in two halves permanently hingedtogether, as at g, and the part f has a flange it extending along theside thereof opposite to that at which the hinges are located, thefunction of this flange being to prevent sand or foreign substancefalling between the cope and drag, this being a feature of my invention,while the drag is provided with a pair of perforated lugs Z according tomy invention and the cope with pins on, adapted to project into 'theperforations in the lugs when the flask is closed, thus localizing thecope relatively to the drag. The lugs Z fit over pins n, and the pins mfit into the lugs 0 upon my combined pattern and follow board, therebylocalizing these parts relatively to one another when the flask is to befilled and rammed.

In molding according to my invention the entire flask is first placed onmy combined pattern or follow board. (See Fig. 2.) The sprue t' is theninserted in the aperture k, the foot of said sprue being formed toproject a short distance through such aperture. This is also a featureof my invention. The flask is then filled with sand and rammed tight,after which the projecting end of the sprue beneath the follow-board ispushed up, thus causing its head to project a short distance above themold and enabling it to be grasped and withdrawn without displacing anysand. The bottom board is then placed on top of the rammed flask and thewhole turned over. The combined pattern and follow board is then drawnand the flask closed.

Any sand or foreign substance dropping into the sprue-hole may be blownthrough the duct in the follow-board, thus insuring a clean cast- 111g.

What I claim is as follows:

1. In a molding apparatus a pattern-board having an aperture extendingcompletely therethrough for receiving and bracing a sprue.

2. In a molding apparatus a combined pattern and follow board having anaperture therethrough for receiving and bracing a sprue.

3. In a molding apparatus the combination with a combined pattern andfollow board having an aperture therethrough for receiving and bracing asprue, of a sprue having its foot of sufficient length to project ashort distance through said aperture substantially as described and forthe purpose set forth.

4. In a molding apparatus the combination with a pattern and the part ofthe flask above same of a sprue adapted to project from the pattern tothe top of the part of the flask above same and means whereby said sprueis loosened from the ingate before being drawn.

5. In a molding apparatus, the combination with a pattern, a cope, and adrag, and means permanently hinging said cope and drag together, ofmeans closing the space between the adjacent upper edges of said copeand drag when they lie upon the pattern ready to be rammed.

6. In a molding apparatus, the combination with a pattern, a cope, and adrag, and means permanently hinging said cope and drag together,of aflange carried by one of said hinged parts and extending across andclosing the space between the adjacent upper edges of said hinged partswhen they lie upon the pattern ready to be rammed.

In testimony whereof I have affixed my signature in presence of twoWitnesses.

PETER LARGIE. N

Witnesses:

FRED J. SEARS, ALBERT W. BATOHELOR.

